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sparc64: Initialize iommu_map_table and iommu_pool 

Like legacy IOMMU, use common iommu_map_table and iommu_pool for ATU.
This change initializes iommu_map_table and iommu_pool for ATU.

Signed-off-by: Tushar Dave <tushar.n.dave@oracle.com>
Reviewed-by: chris hyser <chris.hyser@oracle.com>
Reviewed-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tushar Dave 2016-10-28 10:12:42 -07:00 committed by David S. Miller
parent f0248c1524
commit 31f077dc7d
2 changed files with 21 additions and 0 deletions
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2
arch/sparc/include/asm/iommu_64.h
View File

@ -45,8 +45,10 @@ struct atu_ranges {
struct atu {
struct atu_ranges *ranges;
struct atu_iotsb *iotsb;
struct iommu_map_table tbl;
u64 base;
u64 size;
u64 dma_addr_mask;
};
struct iommu {

19
arch/sparc/kernel/pci_sun4v.c
View File

@ -644,6 +644,8 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
struct atu *atu = pbm->iommu->atu;
unsigned long err;
const u64 *ranges;
u64 map_size, num_iotte;
u64 dma_mask;
const u32 *page_size;
int len;
@ -682,6 +684,23 @@ static int pci_sun4v_atu_init(struct pci_pbm_info *pbm)
return err;
}
/* Create ATU iommu map.
* One bit represents one iotte in IOTSB table.
*/
dma_mask = (roundup_pow_of_two(atu->size) - 1UL);
num_iotte = atu->size / IO_PAGE_SIZE;
map_size = num_iotte / 8;
atu->tbl.table_map_base = atu->base;
atu->dma_addr_mask = dma_mask;
atu->tbl.map = kzalloc(map_size, GFP_KERNEL);
if (!atu->tbl.map)
return -ENOMEM;
iommu_tbl_pool_init(&atu->tbl, num_iotte, IO_PAGE_SHIFT,
NULL, false /* no large_pool */,
0 /* default npools */,
false /* want span boundary checking */);
return 0;
}